Device for creating a bone implant

ABSTRACT

An osteonsynthesis implant has a plate-shaped base component having at least one hole, at least one axially extending rod-shaped tie rod having a first and a second end and at least one threaded component. The first end of the rod-shaped tie rod can be placed in the hole of the base component. The hole and the first end of the tie rod are formed such that the first end of the tie rod can be locked axially in the hole and is pivoted about an axis of the hole while locked to the plate. The second end of the tie rod is provided with a thread and the threaded component can be screwed onto the thread of the first tie rod. The tie rod can perform a pivoting movement of up to about 20° around the hole axis while locked in the plate hole.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a divisional of U.S. patent application Ser.No. 12/156,951, filed Jun. 5, 2008, which claims the benefit of thefiling date of U.S. Provisional Patent Application No. 60/959,274 filedJul. 11, 2007, the disclosures of which are hereby incorporated hereinby reference.

BACKGROUND OF THE INVENTION

This invention relates to a device, particularly a kit for theproduction of an osteosynthesis implant.

Devices known as osteosynthesis or bone plates are commonly used forfracture fixation, generally with the possibility of a longitudinaladjustment of an osteotomy, as is known, for example, from DE 40 07 306C and U.S. Pat. No. 5,129,903. In principle, with bone fractures thereis a problem with fixing the bone parts together and precisely adjustingtheir location. With other indications, a bone is initially fractured ina targeted fashion, to subsequently fix the two bone parts together attheir point of separation (osteotomy) at a fixed or variable distance sothat the bone parts have the opportunity of growing together again.

The known osteosynthesis plates consist of two plate parts,longitudinally displaceable in relation to each other, that can be fixedto the bone parts, for example by means of bone screws. The mechanicalguidance with the known osteosynthesis plates is provided by a dove tailguide members. An extracorporeally operable drive mechanism is providedin this area with which the plate parts can be displaced longitudinallyto each other. In addition, the drive mechanism is formed such that ashaft, for example, is of a length and orientation such that it passesthrough the skin of the patient at only one single site afterimplantation in the patient's body. The shaft can then be operated fromthe outside using a suitable tool, for example, a screwdriver such thatthe osteotomy can be lengthened or shortened.

The known osteosynthesis plates sometimes do not provide satisfactoryresults, particularly when used in the jaw and skull area. Based ontheir design, the known osteosynthesis plates are spread relativelywide, i.e., their spatial depth is relatively large. This isattributable to the construction of the mechanical guide, for example asa dove tail guide. This can lead to difficulties with the implantationin the case of a spatially narrow area, as dictated by nature, at theimplantation site.

With the osteosynthesis plate according to DE 195 42 064 C, an attemptis made to create a design that has significantly smaller dimensions sothat it can be used at spatially narrow implantation sites, e.g., in thejaw or skull area.

Forming the mechanical guide from two cylindrical pins oriented in thedirection of longitudinal displacement and formed from the first part ofthe plate and two cylindrical holes oriented in the direction oflongitudinal displacement and provided in the second part of the platehas been proposed, where the pins are fitted into the holes.

The known osteosynthesis plates therefore are concerned primarily withthe longitudinal displaceability of an osteotomy. They can be used onosteotomies or fractures of relatively large long bones. Use on smallerbones, for example, in the foot area, is practically impossible due totheir still substantial overall size. In addition, they often create anunstable system, from the mechanical point of view, with unpredictablebending moments that can have a fatiguing effect on the material of theosteosynthesis plates and unpredictable forces that affect the bonescrews used for fixing the plates.

BRIEF SUMMARY OF THE INVENTION

The present invention can now be seen to relate, for one thing, to adevice, particularly a kit, for the production of an osteosynthesisimplant that overcomes the disadvantages in the current art.

The problem is solved through the subject of the independent claims, andadvantageous embodiments are embodied in the dependent claims.

According to one aspect of the invention, a kit is proposed for theproduction of an osteosynthesis implant with a plate-shaped basecomponent with at least two holes. At least two rod-shaped tie rodswhose first end can be placed in the holes. The shape of the first endof the tie rods are formed such that the ends can be locked into theholes. When the tie rods are locked in the holes they can perform apivoting movement. The tie rods have at least two threaded componentsthat can be screwed together with second ends of the at least two tierods being threaded. The second ends are each provided with one threadi.e. a male thread on one and a female thread on the other.

Such a device can also be used in the area of relatively small bones,for example in the area of the foot or hand, and, can represent a systemin which the mechanical stresses can be predicted, so that fatiguebreaks, etc., are not expected. The pivoting ability of the tie rods canplay no further role in the implanted state if they are locked into theholes in the plate. The pivoting ability can, however, be a prerequisitefor a tension-free implantation since it can permit the creation ofholes in bones in varying directions, depending on the patient'sindividual situation which can be taken into consideration in situ bythe surgeon. During the surgery, one can now proceed, for example, suchthat the plate-shaped base component is wedged under the osteotomy orfracture by means of tongs. Then the surgeon can create the holes in thebones depending on the actual conditions. Then the minimum of two tierods whose second ends can be screwed together with the minimum of twothreaded components can be placed in the holes in the bone from theother side of the bone. The lengths of the tie rods can be selected suchthat the first ends of the tie rods reach to the holes and can be usedthere. Further actuation of the threaded components can lead to thefirst end locking in the plate Once tightened the pivoting ability ofthe tie rod in situ in the holes is no longer required. Rather, it is acharacteristic of the implant that can be created from the kit or thedevice prior to implantation.

The advantage to the device according to the invention can reside in thefact that angles of the bone holes can be adjusted to the individualpatient, such that the plate-shaped base component and the tie rod,including the two threaded components, can be implanted withoutundesired additional tensile forces, bending moment, etc. Under certaincircumstances, the plate-shaped base component can accept bendingmoments in only one direction, but this is defined and mechanicallypredictable. The tensile forces produced along the tie rod are desiredsince they can provide for a secure hold between the implant and thebone.

The osteosynthesis implant that can be produced from the deviceaccording to the invention is well suited for use in foot as well ashand surgery with narrowed spatial relations and small bones, but is notlimited to this. While the implant according to the present invention isnot preferred for use on large long bones, such as the femur or tibia,where a large number of greater stresses arise and where bending momentsare expected in more than only one direction, the implant can be used onother bones, with the necessary adaptations.

According to an example of an embodiment, provision can be made for thetie rods, while locked into holes, to be able to perform a pivotingmovement of up to 20° around the zero position in which the tie rods canstand perpendicular to the plate-shaped base component. This is in thedelivery state and in the assembled state. As designed, this pivotingability plays no further role under certain circumstances afterimplantation. The pivoting ability can be a prerequisite fortension-free implantation on the bones.

According to one aspect of the invention, provision can be made for thetie rods to be formed as a bushing and the thread components as screws.

According to one aspect of the invention, provision can be made, in akinematic reversal, for the tie rods to be designed at their second endsas threaded spindles and for the thread components to be designed asbushes.

According to one aspect of the invention, provision can be made for thefirst ends of the tie rods to form a sort of bayonet closure with theholes in the plate-shaped base component. After rotation of the threadcomponents screwed onto the second end of the tie rod, the first end ofthe tie rod can be locked into the holes. Further operation of thethread component can increase the tensile forces in the tie rod, whichis desirable to a certain degree in order to stabilize the osteotomy orfracture.

According to one aspect of the invention, provision can be made for thesurfaces of the base component facing the bone to have, at least insections, an open-mesh, three-dimensional net structure. Thisopen-meshed net structure can facilitate the ingrowth and intergrowth ofbone material for long-term fixation.

According to an aspect of the invention, provision can be made for thesurfaces of the thread components facing the bones to have, at least inpart, an open-mesh, three-dimensional net structure, also for thecreation of stable secondary fixation. In this case, for example, asecond surgery is not scheduled to remove the implant after the fractureheals.

According to an aspect of the invention, the base component, tie rodsand thread components can preferably be made of physiologicallycompatible metal.

According to an aspect of the invention, a device is prepared forproduction of an osteosynthesis implant with a plate-shaped basecomponent; a first rod-shaped tie rod; and a first thread component;where the plate-shaped base component has a first hole; where the firstrod-shaped tie rod has a first end and a second end; where the firstrod-shaped tie rod with its first end can be placed in the first holes;where the first hole and the first end of the first tie rod are formedsuch that the first end can be locked into the first hole; where thefirst rod-shaped tie rod can perform a pivoting movement in the lockedstate; where the second end of the first tie rod is provided with athread; and where the first thread component can be screwed on to thethread of the first tie rod.

According to an aspect of the invention, the device is provided with asecond rod-shaped tie rod; and a second thread component; where theplate-shaped base component has a second hole; where the secondrod-shaped tie rod has a first end and a second end; where the secondrod-shaped tie rod with its first end can be placed in the second holes;where the second hole and the first end of the second tie rod are formedsuch that the first end of the second tie rod can be locked into thesecond hole; where the second rod-shaped tie rod can perform a pivotingmovement in the locked state; where the second end of the second tie rodis provided with a thread; and where the second thread component can bescrewed on to the thread of the second tie rod.

According to an aspect of the invention, at least one tie rod canperform a pivoting movement of 20° around the zero position, whilelocked in the related holes, in which position at least one tie rod isperpendicular to the plate-shaped base component.

According to one aspect of the invention, at least one of the tie rodshas an internal thread and the related thread component has an externalthread.

According to one aspect of the invention, at least one the tie rods hasan external thread and the related thread component has an internalthread.

According to one aspect of the invention, a first end of at least onetie rod forms a type of bayonet closure with the corresponding hole inthe plate-shaped base component.

According to one aspect of the invention, a surface of the basecomponent facing a bone has, at least in sections, an open-meshed,three-dimensional net structure.

According to an aspect of the invention, a surface of at least onethread component facing a bone has, at least in part, an open-meshed,three-dimensional net structure.

According to an aspect of the invention, the base component has agreater material thickness in the area of at least one hole than in theareas that are away from the corresponding hole.

According to an aspect of the invention, the greater material thicknessapplies to one of the sides of the base component facing away from thebone.

According to an aspect of the invention, a device is prepared forproduction of an osteosynthesis implant with a plate-shaped basecomponent; a first rod-shaped tie rod; and a first thread component;where the plate-shaped base component has a first hole; where the firstrod-shaped tie rod has a first end and a second end; where the firstrod-shaped tie rod with its first end can be placed in the first holes;where the first hole and the first end of the first tie rod are formedsuch that the first end can be locked into the first hole; where thefirst hole is provided with a deformable lip; where the first end of thefirst tie rod is provided with a first thread; where the first thread ofthe first tie rod can be brought, with positive and non-positive fit,into contact with the deformable lip of the first hole with thedeformation of this deformable lip at least in sections; where thesecond end of the first tie rod is provided with a second thread; andwhere the first thread component can be screwed on the second thread ofthe first tie rod.

According to an aspect of the invention, a device is further preparedwith a second rod-shaped tie rod; and a second thread component; wherethe plate-shaped base component has a second hole; where the secondrod-shaped tie rod has a first end and a second end; where the secondrod-shaped tie rod with its first end can be placed in the second holes;where the second hole and the first end of the second tie rod are formedsuch that the first end can be locked into the second hole; where thesecond hole is provided with a deformable lip; where the first end ofthe second tie rod is provided with a first thread; where the firstthread of the second tie rod can be brought, with positive andnon-positive fit, into contact with the deformable lip of the secondhole with the deformation of this deformable lip, at least in sections;where the second end of the second tie rod is provided with a secondthread; and where the second thread component can be screwed on thesecond thread of the second tie rod.

According to an aspect of the invention, at least one deformable lip hastitanium or consists essentially of titanium. This lip can be segmentedaround its circumference so that it is easier to engage a thread. Thelip can also have a plurality of coils in the direction of the depth ofthe hole so that there is a multiple lip arrangement. The lip segmentscan be rhombic or oval. The edges of the lip can be sharp edged orrounded off. The edges can be continuous or toothed.

According to an aspect of the invention, at least one of the tie rodshas an internal thread and the related thread component has an externalthread.

According to an aspect of the invention, at least one of the tie rodshas an external thread and the related thread component has an internalthread.

According to an aspect of the invention, a first end 4 of at least onetie rod 3 forms a thread connection with the corresponding hole 2 in theplate-shaped base component 1, that facilitates a connection of a hole 2of the base component 1 with a corresponding tie rod 3 at varyingangles.

According to an aspect of the invention, a surface of the base component1 facing a bone is provided, at least in sections, with an open-meshed,three-dimensional net structure.

According to an aspect of the invention, a surface of at least onethread component facing a bone is provided at least in part with anopen-meshed, three-dimensional net structure.

According to an aspect of the invention, the base component, the tierods and the thread components are made of physiologically compatiblemetal.

According to an aspect of the invention, the base or plate component hasa greater material thickness in the area of the holes than in the areasaway from a corresponding hole.

According to an aspect of the invention, the greater material thicknessapplies to a side of the base component facing away from the bone.

According to an aspect of the invention, a process is provided for theproduction of an osteosynthesis implant with a plate-shaped basecomponent, a first and a second rod-shaped tie rod, and a first andsecond thread component, where the plate-shaped base component has afirst and second hole, where the first and second rod-shaped tie rodeach has a first end and a second end, and where each second end of thefirst and second tie rod is provided with a thread; Insertion of thefirst rod-shaped tie rod with its first end in the first hole; Lockingof the first end of the first tie rod into the first hole; Insertion ofthe second rod-shaped tie rod with its first end into the second holes;locking of the first end of the second tie rod in the second hole; wherethe first and second rod-shaped tie ends in the locked state can performa pivoting movement; Screwing of the first thread component onto thethread of the first tie rod; and screwing of the second thread componentonto the thread of the second tie rod.

According to an aspect of the invention, a process is disclosed for theproduction of an osteosynthesis implant with a plate-shaped basecomponent, a first and a second rod-shaped tie rod, and a first andsecond threaded component, where the plate-shaped base component has afirst and second hole, where the first and second rod-shaped tie rodeach has a first end and a second end, and where each second end of thefirst and second tie rod is provided with a thread, where the first andsecond hole has a deformable lip, where each first end of the first andsecond tie rod is provided with a thread and where each second end ofthe first and second tie rod is provided with a second thread; Insertionof the first rod-shaped tie rod with its first end into the first holes;locking of the first rod-shaped tie rod with its first end in the firsthole; locking of the first end of the first tie rod in the first holesuch that the first thread of the first tie rod is brought, withpositive and non-positive fit, into contact with the deformable lip ofthe first hole with the deformation of this deformable lip at least insections; Insertion of the second rod-shaped tie rod with its first endinto the second hole; Insertion of the first end of the second tie rodin the second hole such that the first thread of the second tie rod isbrought, with positive and non-positive fit, into contact with thedeformable lip of the first hole with the deformation of this deformablelip at least in sections; Screwing of the first thread component ontothe thread of the first tie rod; and screwing of the second threadcomponent onto the thread of the second tie rod.

The individual characteristics described can of course be combined witheach other, through which advantageous effects can also be created thatexceed the total of the individual effects.

These aspects of the invention can be achieved by an osteonsynthesisimplant having a plate-shaped base component having at least a firsthole; at least a first axially extending rod-shaped tie rod having afirst and a second end and at least a first threaded component. Thefirst end of the first rod-shaped tie rod can be placed in the firsthole of the base component. The first hole and the first end of thefirst tie rod are formed such that the first end of the first tie rodcan be locked axially in the first hole and is pivoted about an axis ofthe first hole while locked to the plate. The second end of the firsttie rod is provided with a thread. The first threaded component can bescrewed onto the thread of the first tie rod. A second rod-shaped tierod and a second threaded component are provided and the plate-shapedbase component has a second hole. The second rod-shaped tie rod has afirst end and a second end where the second rod-shaped tie rod first endcan be placed in the second holes. The second hole and the first end ofthe second tie rod are formed such that the first end of the second tierod can be locked in the first hole. The second rod-shaped tie rod canperform a pivoting movement in the locked state. The second end of thesecond tie rod is provided with a thread and the second thread componentcan be screwed onto the thread of the second tie rod.

The tie rod can perform a pivoting movement of up to about 20° aroundthe hole axis while locked in the plate hole. The tie rod preferably hasan internal thread and the related threaded component has an externalthread. The tie rod has an external thread and the related threadedcomponent has an internal thread. A first end of the tie rod may form atype of bayonet closure with the corresponding hole in the plate-shapedbase component. A surface of the plate-shaped base component facing thebone can include an open-meshed, three-dimensional net structure. Asurface of the threaded component facing a bone can also have anopen-meshed, three-dimensional net structure. The plate-shaped basecomponent, the tie rod and the threaded component are made ofbiocompatible metal.

The plate-shaped base component has a greater material thickness in thearea of the hole than in an area away from the hole. The greatermaterial thickness applies to a side of the base component facing awayfrom the bone.

Aspects of the invention are accomplished by an osteosynthesis implantincluding a plate-shaped base component having at least a first hole, afirst rod-shaped tie rod having a first and a second end, and a firstthreaded component. The first rod-shaped tie rod first end can be placedin the first hole. The first hole and the first end of the first tie rodare formed such that the first end of the first tie rod can be locked inthe first hole. The first hole has a deformable lip and the first end ofthe first tie rod is provided with a thread where the first threadcomponent of the first tie rod can be brought into contact with thedeformable lip of the first hole with at least partially deforming thedeformable lip. The second end of the first tie rod is provided with asecond thread. The first thread component can be screwed onto the secondthread of the first tie rod. The implant may further comprise a secondrod-shaped tie rod and a second threaded component and the plate-shapedbase component has a second hole. The second rod-shaped tie rod has afirst end and a second end where the second rod-shaped tie rod with itsfirst end can be placed in the second hole. The second hole and thefirst end of the second tie rod are formed such that the first end ofthe second tie rod can be locked in the second hole. The second hole hasa deformable lip where the first end of the second tie rod is providedwith a thread and where the first thread component of the second tie rodcan be brought, with positive and non-positive fit, into contact withthe deformable lip of the second hole at least partially deforming thedeformable lip. The second end of the second tie rod is provided with asecond thread. The second thread component can be screwed onto thesecond thread of the second tie rod. The deformable lip may be titaniumor titanium alloy.

Another aspect of the invention relates to a method for implanting anosteosynthesis implant which includes providing an osteosynthesisimplant including a plate-shaped base component, a first and secondaxially extending rod-shaped tie rod, and a first and second threadedcomponent. The plate-shaped base element has a first and a second hole,where the first and the second rod-shaped tie rod each has a first endand a second end, and where each second end of the first and the secondtie rod is provided with a thread. The first end of the first rod-shapedtie rod is inserted into the first base component hole. The first end ofthe first tie rod is locked in the first hole in the axial direction.The first end of the second rod-shaped tie rod is inserted in the secondbase component hole. The first end of the second tie rod is axiallylocked into the second hole. The first and the second rod-shaped tierods may be pivoted in the axially locked state. The first threadcomponent is screwed onto the thread of the first tie rod and the secondthread component is screwed onto the thread of the second tie rod. Adeformable lip may be provided, where the first end of each of the firstand second tie rods are provided with a thread and where each second endof the first and second tie rod is provided with a second thread. Thefirst rod-shaped tie rod is inserted with its first end into the firstholes and locked. The first thread of the first tie rod is brought, withpositive and non-positive fit, into contact with the deformable lip ofthe first hole at least partially deforming the lip.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other aspects of this invention are explained and elaboratedthrough reference to the embodiments described as examples below.Examples of embodiments are described in the following with reference tothe following drawings. They show:

FIG. 1 is a cross-section view through an example of an embodiment ofthe three components of the set;

FIG. 2 is a schematic view of an example of an embodiment of a basecomponent with a tie rod;

FIG. 3 is a view of an example of an embodiment of a plate-shaped basecomponent and the enlargement of detail Z;

FIG. 4 is an enlarged cross-section view through an example of anembodiment of the base component in the area of one of the holes withthe tie rod inserted and locked;

FIG. 5 is a schematic view of an example of an embodiment of theosteosynthesis implant prepared from the set, after implantation;

FIG. 6a is a schematic view of an example of an embodiment with acoating;

FIG. 6b is an example of an embodiment of a lip in undeformed conditionwithout the thread applied;

FIG. 6c is an example of an embodiment of a lip in deformed conditionwith the thread applied;

FIG. 7 is a schematic view of the flow of a process according to anexample of an embodiment of the invention; and

FIG. 8 is a schematic view of the flow of a process according to anotherexample of an embodiment of the invention.

DETAILED DESCRIPTION

FIG. 1 shows a schematic cross-section through all three components ofthe system according to an example of the invention. The plate-shapedbase component 1 has at least two holes 2, and preferably four holes. Ineach of the holes 2, a tie rod 3 can be placed with its first end 4engaging hole 2. The second end 7 of the tie rod 3 is provided, with athread 6. A threaded component 5 preferably in the form of a bushingwith a female thread 100 can be screwed onto the threaded end 7 of tierod 3. A tool attachment 10 is provided in a head 10A, for example ahexagon socket.

The distinctive feature about the connection between tie rod 3 and thebase component 1 is shown in FIG. 2 according to a preferred embodimentof the invention. A first end 4 of tie rod 3 is placed in hole 2 in baseplate component 1. The hole 2 and the first end 4 of tie rod 3 aredesigned such that the end 4 can be locked into hole 2, where tie rod 3can, in the axially locked position, performed a pivoting movement, asshown by the dotted line of tie rod 3 in FIG. 2, where a pivot movementof 10° around the zero position is shown, i.e., the position in whichtie rod 3 is perpendicular to plate-shaped base component 1. Thispivoting movement comes to bear only indirectly in the implantation, asexplained in greater detail below in relation to FIG. 5.

The surface of the base component 1 facing the bone is, according to oneembodiment of the invention presented here in cross-section, anopen-meshed, three-dimensional net structure 8 in which and throughwhich the bone trabecula organizes and grows and thus ensures a lastingsecondary fixation. A comparable structure is shown here on the surfaceof thread component 5 facing the bone in FIG. 1.

FIG. 3 shows a view of plate-shaped base component 1 according to anembodiment of the invention with four holes 2. Furthermore, the enlargeddetail Z is to be noted which shows a special contour for the holes 2.This is necessary according to a preferred embodiment of the inventionto permit axial locking between the plate and tie rod 3, on the onehand, and on the other hand, to allow a certain degree of pivotingmovement despite the axial locking. Arrow A shows the direction of useof the first end 4 of a tie rod 3 in the hole 2 with locking. Arrow Bthen indicates the movement of the tie rod 3 in the hole 2 duringlocking. Here, the first ends 4 of the tie rod 3 together with the holes2 form a bayonet closure according to one example of embodiment of theinvention. Thus, the end 4 of tie rod 3 is inserted in hole 2 androtated a quarter turn to cyclically lock the tie rod in hole 2.

The pivoting ability of the first end 4 of the tie rod 3 in the hole 2in the base component 1 is indicated in FIG. 4. Despite the positive fitagainst further rotation in the locked state, it is possible, accordingto an example of embodiment of the invention, to pivot the tie rod 3 inthe hole 2, as indicated in FIG. 2.

The mechanism of action of the set or the osteosynthesis implant createdfrom it is shown in FIG. 5. It shows a cross-section of theosteosynthesis implant located on the bone 11 to stabilize the fracture12.

The four hole base component 1, lies to one side of the bone 11 to bestabilized. It is then wedged there with tongs (not shown). In thisposition, it serves as a hole template to create the four holes here inthe bone, at different angles, depending on the shapes and distinctivecharacteristics of the bone. After creation of the holes in bone 11, theunit composed of the tie rod 3 and the thread component 5 screwed ontoit is placed in the respective hole in the bone until its first endcomes into the area of hole 2 in the base component 1. A furtherrotation of the threaded component 5 leads to the locking of the tie rod3 in the hole 2. It is reasonable that the pivoting ability of the tierod 3 in the hole 2, explained above in greater detail, is aprerequisite for the insertion of the tie rods 3 into the holes withdifferent orientations during implantation.

The result is a tension-free seat for the implant in and on the bone 11so that no additional stresses that could not be known in advance areintroduced to the bone 11 and the stresses also do not affect theimplant. A further rotation of the thread component 5 leads to anincrease of the tensile forces in the tie rods 3, which can lead to agreater stabilization of the fracture 12.

The base component 1, the tie rods 3 and the thread component 5 arepreferably made of a physiologically compatible metal to be able towithstand the resultant stresses, for example, such as stainless steelor titanium.

FIG. 6a shows an arrangement according to a second embodiment of theinvention in which a device for production of an osteosynthesis implantis provided with a plate-shaped base component 1, a first rod-shaped tierod 3 and a first thread component 5. The plate-shaped base component 1has a first hole 2. The first rod-shaped tie rod 3 has a first end 4 anda second end 7, where the first rod-shaped tie rod with its end 4 can beplaced in the first hole 2. The first hole 2 and the first end 4 of thefirst tie rod 3 are formed such that the first end 4 can be locked intothe first hole 2. In the first hole 2, a deformable lip 21 is provided.The first end 4 of the first tie rod 3 is provided with a first thread22, where the first thread 22 of the first tie rod 3 can be brought,with positive and non-positive fit, into contact with the deformable lip21 of the first hole 2 under deformation of this deformable lip 21 atleast in sections. The second end 7 of the first tie rod 3 is providedwith a second thread 6 where the first thread component 5 can be screwedonto the second thread 6 of the first tie rod 3.

According to a further embodiment of the invention, the device has asecond rod-shaped tie rod 3 and a second threaded component 5. Theplate-shaped base component 1 has, according to an example of embodimentof the invention, a second hole 2. The second rod-shaped tie rod 3 has,according to an example of embodiment of the invention, a first end 4and a second end 7, where the second rod-shaped tie rod with its firstend 4 can be placed in the second holes 2. The second hole 2 and thefirst end 4 of the second tie rod 3 are, according to an example ofembodiment of the invention, formed such that the first end 4 of thesecond tie rod 3 can be locked into the second hole 2. A deformable lip21 is provided in the second hole 2, according to an example ofembodiment of the invention. The first end 4 of the second tie rod 3 canbe provided with a first thread 22, where the first thread 22 of thesecond tie rod 3 can be brought, with positive and non-positive fit,into contact with the deformable lip 21 of the second hole 2 underdeformation of this deformable lip, at least in sections, where thesecond end 7 of the second tie rod 3 can be provided with a secondthread 6. The second thread component 5, according to an example ofembodiment of the invention, can be screwed onto the second thread 6 ofthe second tie rod 3.

According to one embodiment of the invention, at least one of thedeformable lips 21 has titanium or is made essentially from titanium.Titanium is a particularly light and stable material that is also verywell tolerated by the human body.

According to another embodiment of the invention, a first end 4 of atleast one tie rod 3 is formed, with the corresponding hole 2 in theplate-shaped base component 1, as a thread component that enables aconnection of hole 2 of the base component 1 with a corresponding tierod 3 at various angles.

A screw head can, for example, be provided with a hexagonal recess sothat a tool can be inserted for secure fastening. Due to an increasedmaterial thickness 23 in the area of the hole 2, an enlarge hole depthcan be created for the thread connection without having to significantlyincrease the weight of the entire implant there.

FIG. 6b shows a hole 2 with a lip 21 where the lip is not yet deformedby the insertion of a thread 22. FIG. 6c shows the thread 22 screwedinto the hole 2 where the lip 21 undergoes deformation due to theinsertion of the thread 22, which creates both a non-positive and apositive fit connection between the thread 22 and the lip 21 in hole 21.

FIG. 7 shows a process used to create an osteosynthesis implant. S1 isthe preparation of an osteosynthesis implant with a plate-shaped basecomponent, a first and a second rod-shaped tie rod, and a first and athread component, where the plate-shaped base element has a first and asecond hole, where the first and the second rod-shaped tie rod each havea first end and a second end, and where each second end of the first andthe second tie rod is provided with a thread; S2 is the insertion of thefirst rod-shaped tie rod with its first end into the first holes; S3 isthe locking of the first end of the first tie rod in the first hole; S4is the insertion of the second rod-shaped tie rod with its first end inthe second holes; S5 is the locking of the first end of the second tierod into the second hole; where the first and the second rod-shaped tierod can perform a pivoting movement in the locked state; S7 is thescrewing of the first thread component onto the thread of the first tierod; and screwing of the second thread component onto the thread of thesecond tie rod.

FIG. 8 shows an example of an embodiment of a process for the productionof an osteosynthesis implant. S11 is the preparation of anosteosynthesis implant with a plate-shaped base component, a first and asecond rod-shaped tie rod, and a first and a thread component, where theplate-shaped base component has a first and a second hole, where thefirst and the second rod-shaped tie rod each has a first end and asecond end, and where each second end of the first and second tie rod isprovided with a thread, where in the first and second hole a deformablelip is provided, where the first end of each of the first and second tierods is provided with a thread and where each second end of the firstand second tie rod is provided with a second thread; S12 is theinsertion of the first rod-shaped tie rod with its first end into thefirst holes; S13 is the locking of the first end of the first tie rod inthe first hole such that the first thread of the first tie rod isbrought, with positive and non-positive fit, into contact with thedeformable lip of the first hole with deformation of this deformable lipat least in sections; S14 is the insertion of the second rod-shaped tierod with its first end of the second holes; S15 is the locking of thefirst end of the second tie rod in the second hole such that the firstthread of the second tie rod is brought, with positive and non-positivefit, into contact with the deformable lip of the second hole, withdeformation of this deformable lip, at least in sections; S16 is thescrewing of the first thread component onto the thread of the first tierod; and S17 is the screwing of the second thread component onto thethread of the second tie rod.

Note that the steps in the process can also be carried out, to theextent expedient, in a different sequence.

Note that the term “comprise” does not exclude additional components orprocess steps; similarly, the terms “a” and “one” does not exclude aplurality of components and steps. The reference numbers used servesolely to increase comprehensibility and should not, in any way, beconsidered limitative, where the scope of protection of the invention isreproduced in the Claims.

Although the invention herein has been described with reference toparticular embodiments, it is to be understood that these embodimentsare merely illustrative of the principles and applications of thepresent invention. It is therefore to be understood that numerousmodifications may be made to the illustrative embodiments and that otherarrangements may be devised without departing from the spirit and scopeof the present invention as defined by the appended claims.

The invention claimed is:
 1. An osteosynthesis implant comprising: aplate-shaped base component having at least a first hole; a firstrod-shaped tie rod having a first and a second end; a first threadedcomponent; where the first rod-shaped tie rod first end can be placed inthe first hole; where the first hole and the first end of the first tierod are formed such that the first end of the first tie rod can belocked in the first hole; where the first hole has a single deformablelip; where the first end of the first tie rod is provided with a thread;where the first thread component of the first tie rod produces aninterference fit with the single deformable lip of the first hole atleast partially deforming the single deformable lip so that the lip hasdeformed sections; where the second end of the first tie rod is providedwith a second thread; and where the first thread component can bescrewed onto the second thread of the first tie rod.
 2. The implant ofclaim 1, further comprising: a second rod-shaped tie rod; and a secondthreaded component; where the plate-shaped base component has a secondhole; where the second rod-shaped tie rod has a first end and a secondend; where the second rod-shaped tie rod with its first end can beplaced in the second holes; where the second hole and the first end ofthe second tie rod are formed such that the first end of the second tierod can be locked in the first hole; where the second hole has a singledeformable lip; where the first end of the second tie rod is providedwith a thread; where the first thread component of the second tie rodcan be brought, with positive and non-positive fit, into contact withthe single deformable lip of the second hole at least partiallydeforming the deformable lip; where the second end of the second tie rodis provided with a second thread; and where the second thread componentcan be screwed onto the second thread of the second tie rod.
 3. Theimplant of claim 1 wherein the deformable lip is titanium or titaniumalloy.
 4. The implant of claim 2 wherein at least one of the tie rodshas an external thread and the related thread component has an internalthread.
 5. The implant of claim 1 wherein a surface of the basecomponent facing a bone is provided, with an open-meshedthree-dimensional net structure.
 6. The implant of claim 1 wherein asurface of at least one threaded component facing a bone is provided,with an open-meshed three-dimensional net structure.
 7. The implant ofclaim 1 where the base component, the tie rod and the threaded componentare made of a biocompatible metal.
 8. The implant of claim 1 wherein thebase component has a greater material thickness in the area of the holethan in an area away from the hole in a direction perpendicular to asurface of the base component facing the bone.
 9. The implant of claim 8wherein the greater material thickness is on a side of the basecomponent facing away from a bone surface and a bone contacting surfaceof the base component.
 10. The implant as set forth in claim 1 whereinthe engagement of the tie rod threaded first end and the singledeformable lip of the bone plate locks the tie rod to the bone plate inthe axial direction.
 11. An osteosynthesis implant comprising: a boneplate having a first hole therethrough extending from a bone contactingsurface of the plate to an outwardly facing surface of the plate, asingle deformable lip extending around a circumference of an inner wallof the bone; a tie rod having a threaded first end and a threaded secondend, the first threaded end producing an interface between the firstthreaded section and the lip whereby deforming the lip; a threadedcomponent engaging the threaded second end of the tie rod; and whereinthe engagement of the tie-rod threaded first end and the deformable lipdeforms the lip of the bone plate bore to lock the tie rod to the boneplate in the axial direction.
 12. The implant of claim 11 wherein thedeformable lip is titanium or titanium alloy.
 13. The implant of claim12 wherein at least one of the tie roads has an external thread and therelated thread component has an internal thread.
 14. The implant ofclaim 11 wherein a surface of the base component facing a bone isprovided, with an open-meshed three-dimensional net structure.
 15. Theimplant of claim 11 wherein a surface of at least one threaded componentfacing a bone is provided, with an open-meshed three-dimensional netstructure.
 16. An apparatus configured to fasten an osteosynthesisimplant, comprising: a base plate element having a first attachmentopening, the first attachment opening including an inner wall having adeformable ledge; a first anchor bolt having an upper and lower end, theupper and lower end having a threaded portion; and a first threadedfastening bolt, the threaded fastening bolt configured to threadablyengage with the threaded portion of the first anchor bolt upper end;wherein the lower end of the first anchor bolt and the first attachmentopening of the base plate element are configured to engage and fastenwith each other, and the deformable ledge is configured to be deformedby the threaded portion at the lower end of the first anchor bolt so asto form a mechanical connection between the base plate element and thefirst anchor bolt.